I'm having the same issue, I brought my car into the dealership to have the oil changed and the front brake pads replaced and when I got it back it pulls to the right when accelerating and back to the left when I let go of the gas. Before I brought it in, it sounded like my diff. was making a grinding noise and now after I got it back it doesn't at all anymore, which is nice but now it's pulling...I'll take it back tomorrow and see what they say.

 

Most likely reasons this could happen:

1.) Tires worn unevenly.
2.) Brakes hanging up
3.) Tires of different tread construction or tread depth
4.) Coilover install done wrong. Did you get an alignment AFTER installing the coilovers?
5.) Worn bushings. Did you clock your bushings?


The tires are probably the most likely culprit. Try changing them from side to side. It doesn't matter if they're directional. Just do it temporarily to check.

Do the tires have any uneven wear? Is one side worn more than the other? Was your alignment done correctly? Do you have a print out?

 

the car did this before i lowered it with a alignment and after exactly the same. i did check tire pressure so it's not that. next i'll look at tread i guess.

 

I was thinking this as well. Check to see if a brake caliper is seized or brakes are dragging anywhere.

 

Easy way to check is to drive around for a bit and pull over. Feel rim/hub to see if one is hotter than the other. Hotter one is probably seizing up.

 

My right rear tire, for some reason, has more wear than the others so thats why it was pulling. I put about 3psi more air into it to compensate and it solved the problem...

 

how do i fix a caliper that has seized?

 

bump

 

Have you checked anything?

 

^
uneven tire tread...